Aut cum scuto aut in scuto
I'm guessing that, in order to know ahead of time exactly what lies buried in all that snow, such as deep holes, fallen trees, or hidden drop-offs, they probably prepared by doing a lot of reconnaissance during the Summer months.
Absolutely no doubt of that. Winch required, and if it were me, I'd have those tires chained up aggressively. Hood deep snow like that makes my knees knock, but that snowboard ride on the way down was epic!